Door check bracket



Feb. 25, 1947., v 5 mgs 2,416,316

DOOR CHECK BRACKET Filed Dec. 5, 1945 k as ATTORNEY Patented Feb. 25,1947

DOOR CHECK BRACKET John Hines, South Norwalk, Cnn.,- assignor to Norwalk Lock Company, New York, N. Y., a corporation of Connecticut Application December 3, 1945, Serial No. 632,375

6 Claims.

The invention is a door check and the dominant object thereof resides in the provision of novel and swiveled means to insure proper alinement 'of the door check to preclude'binding'thereof during opening or closing of the door. The invention has as another object to'provide an improved compensatory apparatus'carrying the door check for automatically lining up the door check due to improper mounting of the door or improper mounting of the door check. The invention has as a further object the provision of a serviceable expansion cup to sustain the piston of an air pump employed in the door'check in seal tight engagement with the bore of the cylinder of the pump during reciprocation oi the piston on opening and closing of the door. Other objects, advantages and features of the invention will be apparent from the following detailed description taken with the accompanying drawings wherein;

Fig. 1 is a front elevational View of the door check according to my invention shown mounted on the jamb of thedoor and on the latter, however showing the door closed but adapted to be swung rearwardly. i

Fig. 2 is an enlarged horizontal sectional view on the line 2-2 ofFig. ljsh'own partly broken away. r i

Fig. 3 is an enlarged sectional View on the line 3-3 ofFig.2.

Fig. 4 is an enlarged fragmentary View of Fig. 2.

Figs. 5 and 6 are longitudinal and transverse sectional views on the lines 5'5,' and 6-6 respectively of 2.

Fig. '7 is a perspective view of the expansion cup.

Fig. 8 is a horizontal sectional view on'the line 88 of Fig. 3.. l

Fig. 9 is a sectional View on the line 9-9 of Fig. 3 indicating the neutral relationof the swiveled yoke at a time when the door is closed.

Fig. 10 is a view similar to Fig. 9 but illustrating the swiveled yoke cocked when the door is fully opened, and. H

Fig. .11 is a'horizontal sectional View on the line Hll ofFig. 3. l

Referring to the drawings, the door check C includes the air pump A, the,spring recoil device or brake R, the swiveled connection S, and the bracket B. v l

The pump A comprises a cylinder Ill having the circular borell slidablyguiding the piston head P to which is attached the panama l2 reciprocably guided in the cap l3 appropriately fastened inseal tightrelation-tooneendbi the .cy M "I;

Threadably and removably connected to the other end of the cylinder is the cap l4 integrally carrying boss l5 sustaining fulcrum pin IS on which the cars l! of the bracket B are swingably retained. By such arrangement cars I! straddle boss I 5 and are hingedly associated with the latter. Consequently-if the bracket is held in a fixed relation the pump A may be swung relative to the bracket. In actual practice, however, the base :8 of the bracket is secured to a swinging door D by fastening means such as screws (not shown) fitting into the openings l9.

Rotatably and adjustably mounted on the boss I5 is the threaded valve 28 having the tapered end or valve head 2! adapted to open and close the orifice 22 which is .in communication with bore H of the cylinder Ii). Specifically the knurled head 23 of the valve may be rotated for positioning the valve head 2! against the valve seat 24 or away therefrom. The valve includes a relatively smooth portion 22% which is adapted to open and close orifice 25 which in turn is in communication with orifice 22. Thus by controlling the knurled head 23 it is possible to regulate the volume of air that may be drawn into the cylinder or casing It].

Locking means is provided to hold the knurled head 230i the valve in a set position. For this purpose the pointed end 2'! of a slidably guided tumbler 28 is utilized to disengageably interlock with the teeth of the'knurled rim of the head 23 and such action is sustained by the confined and concealed spring 25 normally urging the tumbler 28 towards the head 23.

disc 30, a primary cup 3| which may be of leather or felt, a supplementary spring cup 32 nested in cup 3!, a washer 33, and a nut 34, all mounted on the reduced stem 35 of the piston rod I2, the arrangement being such that clamping action of the nut 34 on the threaded stem 35 holds the washer 33 clamped against spring cup 32 which in turn holds the felt or leather cup 3| clamped against disc 30 and the latter against shoulder 35 of the piston rod 2.

The nested and, metal cup 32 has its annular and tapered rim 31 provided with a plurality of tapering slots 38 to define spaced and resilient outwardly inclined or diverging resilient fingers 38 coasting with the annular rim 40 of the felt or leather cup 3! to desirably hold the latter in seal tight sliding or reciprocating engagement with the bore ll of the cylinder H] as; the piston rod I2 is 'reciprocated; Each-slot has itsnarrow portion at the outer margin of the rim 31and its accidental rotation of the latter.

mernber l looselysurrounds 'terposed between the mount 61 and the skirt 59.

pressed. I

widest portion at the base 31 of the cup 32, the widest portions merging with the spaced notches 38' along the outer edge of base 3?.

The piston rod l2 extends into and is also threadably connected to the crank or elbow M having its lower arm $2 provided withthe irregularly or partly non-circular shaped opening d3 (Fig. 2) closely receiving and interlocking with a similarly shaped shaft 4e rotatably guided in the bearings or circular openings and 45 in the spaced arms 5'! and d8 of the U shapedoscillatable or swiveled yoke Y having its base or intermediate portion 48 provided with the arcuate portions or earns 59 defining the irregularly shaped opening 5| receiving the squared shaped head or boss 52 of the threaded bolt 53.

The square shaped head 52 is spot welded to the bracket to and thus is fixedly carried by the latter. Surrounding the threaded shank 54 of the bolt is the annular washer 55 adapted to be clamped against the flat face 55 of the boss 52 by the nut 51. By the arrangement disclosed, yoke Y may be rotatabl rocked or swiveled on the square shaped boss 52 Which'in fact characterizes fulcrum means for the cam-s of the intermediate arm 49 which is rotatably guided between the washer and the bracket 54. It follows that if the door be rotated or swung towards or away from the jamb J, yoke Y may be tilted relative to the jamb or to the fixed bracket or support 54.

As previously stated the irregularly shaped shaft 44 is locked or keyed to the crank d! and if thelattcr is driven shaft 44 is rotated. This shaft is also rotatably guided in the circular bore 5'! of the hollow gear 5&and extends downwardly therethrough and through the depending skirt 59 of the gear and downwardly through an irregularly shaped opening 53 of a mount 55 appropriately seated on arm 48 of the yoke Y and having its annular flange 62 confined in the annular housing 63 interposed between the arms t? and 48 of the yoke. Since shaft 44 is thus also keyed to the mount 5!, rotation of the crank arrn H causes the rotation of mount 6 i.

The hollow mount 5| is provided with a cutaway part is adapted to receive a reflexed end es of the lowest @011 so of the helicoidal sprin 6'6 or mother words this spring is locked to the mount 5! and if the latter is rotated, the spring is wound up in that the upper coil 65 has its refiexed terminal 69 retained against a lip ii! of the bayonet slot H in the annular skirt as depending from the gear 53; Set screws as '32 and washers 73 prevent vertical displacement of. the rotatable shaft relative to the yoke Y;

Normally spring 51 is under some tension, that list wound up although not fully. This is accomplished by applying a suitable wrench to the rotatable gear 58, thus tensioning or compressing the upper part of the spring. The swiveled dog 14 is then interlocked with the gear 58 to prevent If shaft 34 is driven by the crank H, the keyed mount 5! is rotated, hence winding up the lower part of This tubular member lim ts the eXtent to which the thrust imparting springE'l may be com- As a collateral In mounting the door check for controlling the closing of the door, the wings To of the bracket or support 5 5 are appropriately fastened to the jarnb or frame J of the swingable door D and the swingable bracket B is fastened to the door. On opening of the door, the piston head P is shifted in the cylinder i9 away from cap as, thus air is d awn into the cylinder through the oriices 26 and 22. At this time the piston rod I2 is progressively projected out of the cylinder Ill thus rotating crank arm ti, consequently rotating shaft :34 of the brake or recoil device R. It follows that the tension spring 51 is further compressed.

During the tensioning of the spring 5?, yoke Y is transversely rocked relative to the support 54, that is slightly rotated from its neutral position shown in Fig. 9 towards an onset position illustrated in Fig. 10, thus precluding binding of the door and provide for uniform operation of the door check, thereby prolonging the latters life. Or in other words, the swiveled connection S compensates for the irregularities or misalinements in mounting the door or the check on the door and jamb. As the piston rod is projected from the cylinder air is drawn from the atmosphere past the adjustable bleeder valve 26 and into the cylinder and air in the cylinder is exhausted through the clearing vent or orifice I? (Fig. 1).

After opening of the door and manual release thereof, the recoil of spring 67 is utilized to automatically close the door. Thus shaft 64 is rotated or retracted to its normal position or predetermined relation and consequently crank arm ll retracts the swiveled yoke Y which automatically tilts back to its neutral position and the piston is again disposed adjacent the cap I l. on the return stroke of the piston, the door is checked from abruptly closing. This checking action is pneumatic since on the return stroke of the piston, a

slight amount of air only is discharged through the clearing vent l7 and the remainder of the air within the cylinder i9 is compressed and gradually exhausted through the orifices 22 and 26, thus providing a cushioning effect.

By reason of the swiveled or pivoted relation between the yoke Y and the fixed bracket 54, involuntary misalinement of the door check is com-. pensated for; or in other words, the swiveled connection S betweenthe brake carrying yoke Y and the fixed bracket 54 characterizes a loose connec-' tion to prevent binding of the door check, thus enhancing its life.

The brake or rec-oil device and the air pump A compensatory apparatus to sustain the braking device of the door check wherein the pump there- V of is pivotally associated with thehing-ed door, the compensatory apparatus having the swiveled or pivoted connection defined in part by the square shaped head or fulcrum means 52 of the threaded bolt 53 fixedly carried by the support 54. Forming a part of this swiveled connection are the plurality of cams 5t bounding the irregular V shaped opening 5| or in other words, opening 5| has a, peripheral wall embodying the cam means Blljthe latter obviously being a part of the base 49 of the swiveled yoke or carrier means Y. The swiveled connection tiltably holds or sustains the carrier means Y relative to the support 54 and such connection is maintained or retained by the clamping means 51 acting on washer 55 by precluding base 49 from slipping off the fulcrum means 52. 7

Various changes may bemade in details of construction and arrangement of parts without departing from the spirit of the invention or sacrificing any of the advantages thereof inherent therein.

I claim: I

1. In a compensatory apparatus to sustain a braking device of a door check wherein a pump is pivotally associated with a door hinged relative to the jamb of said door, a support mounted on said jamb and characterizing bearing means, a yoke having spaced arms for sustaining said braking device and having a base juxta-v positioned and displaceable relative to said bearing means, said base having an opening bounded by a peripheral wall having convex surface means, fulcrum means fastened to said support and having a portion disposed in said opening and having rectilinear means cooperating with said convex surface means to tiltably sustain said yoke relative to said bearing means, and means mounted on said fulcrum means and 00- operating with said yoke to retain said base in close juxtaposition with Said bearing means.

2. In a compensatory apparatus to sustain a braking device of a door check wherein a pump is pivotally associated with a door hinged relative to the jamb of said door, a support mounted on said jamb and characterizing bearing means, a yoke having spaced arms for sustaining said braking device and having a base juxtapositioned and displaceable relative to said bearing means, said base having an opening bounded by a peripheral Wall having a plurality of convexed portions, fulcrum means fastened to said support and having a polygonal head comprising rectilinear faces disposed in said opening and cooperating with said convexed portions to tiltably sustain said yoke relative to said bearing means, and means mounted on Said fulcrum means and cooperating with said yoke to retain said base in close juxtaposition with said bearing means.

3. In a compensatory apparatus to sustain a braking device of a door check wherein a pump is pivotally associated with a door hinged relative to the jamb of said door, a support mounted on said jamb, a yoke adjacent said support and I 4. In a compensatory apparatus to sustain a braking device of a door check wherein a pump is pivotally associated with a-door hinged relative to the jamb of said door, a support mounted on said jamb, a yoke having spaced arms for sustaining said braking device and having a base including an opening bounded by a Wall having arcuate portions, a bolt secured to said support and having a head provided with a polygonal periphery projecting into said opening and cooperating with said arcuate portions to tiltably hold said yoke relative to said support, and means mounted on said bolt for retaining said yoke adjacent said support;

5. In a compensatory apparatus to sustain a braking device of a door check wherein a pump is pivotally associated with a door hinged relative to the jamb of said door, a support mounted on said jamb, a yoke having spaced arms for straddling and sustaining said braking device and having a base including an opening bounded by a peripheral Wall having a plurality of arcuate portions, a bolt secured to said support and having a rectangular shaped head projecting into said opening and cooperating with said arcuate portions to tiltably sustain said yoke relative to said support, and means mounted on said bolt for retaining said yoke adjacent said support.

6. In a compensatory apparatus to sustain a braking device of a door check wherein a pump is pivotally associated with a door hinged relative to the jamb of said door, a support mounted on said jamb, a yoke adjacent said support and having spaced arms for sustaining said braking device and having a base including an opening bounded by a peripheral wall having a plurality of arcuate faces, fulcrum means fixedly carried by said support and having a portion provided with a plurality of rectilinear faces and surrounded by and cooperating with said arcuate faces to tiltably sustain said yoke relative to said support, and means to retain said yoke adjacent to said support.

JOHN HINES.

REFERENCES CITED The following references areof record in the file of this patent:

UNITED STATES PATENTS Number Name Date 577,266 Page Feb. 16, 1897 1,115,539 I-Ioferle Nov. 3, 1914 1,662,395 Norton Mar. 13, 1928 329,296 Elliott Oct. 27, 1885 FOREIGN PATENTS Number Country Date 114,478 Australian Oct. 24, 1940 

